Anthracene dye and process of making same.



UNITED sratrgswnur OFFICE.

MAX ISLER, OF MANNHEIM, GERMANY, ASSIGNOR TOBAgDISGHE ANILIN & SODA FABRIK, OF LUDWIGSHAFENON-THE-RHINE, GERMANY, A CORPORATION orv GERMANY.

ANTHRAiCENE DYE AND PROCESs OF"M AKING SAME.

Specification of Letters Patent.

Patented July 27, 1909.

Application filed March 25,1909. Serial n6. 485,672.

To all whom it mag concern:

Be it known that 1-, MAX HENRY ISLER,

chemist, citizen of the Swiss Republic, residmg at. Mannheim, Germany, have invented new and useful Improvements in Anthra-' in 2.2-dimethyl 1.l dianthraquinonyl, or a homologue, or derivative, thereof, either alone,-or in the presence of a dehydrating agent, and with, or without, Subsequent treatment with anoxidizing agent." The coloring matters therein described dye cotton,

from the rat orange shades of. excellent fastness. As-an instance of the derivatives employed 4.4 dichlor 2.2 dimethyl 1J1- li'anthraquinonyl is mentioned, but in this case, and also in other cases where alpha: halogen derivatives are employed, it appears that the halogen atom is at any rate to some extent removed from the molecule during the reaction.

I have discovered that beta -halogenated 2.2'-dimethyl-l.1-dianthraquinonyl bodies in which the halogen is not contained in the "same ring as the methyl group can be treated in the manner described in the aforesaid specification, and that the specific coloring matters obtained possess properties -Wl1lCl1 render them much more valuable than the coloring matters obtainable from the alphahalogen-2.2-dimethyl-1.l-dianthraquinonyl bodies. The halogen atom remains intact in the molecule and the coloring matters" dye cotton particularly reddish shades of yellow and possess,moreover, an exceptional fastness against the action of chlorin. As

coinpounds Which'can be thus used I mention 6.6sdichlor-22f dimethyl-1.1-dianthraquinonyl and 7.7 -dichlorv-2.2'-di1nethyl 1.1 dianthraquinonyl, either of which can be ob tained by condensing together beta-chlor phthalic anhydrid and toluene by means of the Friedel-Crafts react-ion andthen subject,-

ing the'chlor-methyl-anthraquinone so ob-,

tained to nitration, reduction, diazotization, and treatment of the diazo compound with copper powder, as described in the aforesaid holic potash.

specification. Since the coloring matters obtainable from the aforementioned isomeric dichlor dimethyl dianthraquinonyl bodies differ very little from one another in their coloring properties, it is not necessary to separate thetwo compounds before convert.-

ing them intocoloring matter,which conversion into coloring matter can be done in a manner similar to that described in the a foresaid specification No. 856,811;

The coloring. matters obtainable according to this invention possess the same generic properties as do the coloring matters 0btainable by' heating a 2.2-dimethyl 1.l'- dianthraquinonyl body and treating the resulting compound with a halogenizing agent .as described in the specification of. Letters Patent No. 876,810, but some of them ditl'er from the said described coloring matters in possessing a different spectrum.

Now what I claim is:

1. The process of producing anthraquinone coloring matter by heating a beta-halogen- 'ated 2.2- di1nethyl- 1.1- dianthraquinonyl body containing the halogen in the op posite ring to that containing the methyl group. l 2. The process of producing anthraquinone coloring matter by heating a beta-halogenated 2.2- dimethyl 1.1"- dianthraquinonyl body containing. the halogen in the opposite ring to that containing the methyl group with a condensing .agent,'

i 3. The process of producinganthraquinone coloring matter by heating a beta-ha logenated 2.2 dimethyl 1.ldianthraquinonyl body containing the halogen in theopposite ring to that containing the methyl group with alcoholic potash.

4. The process of producing anthraquinone.

coloring matterby heating 6.(l.-dichlor-2.2"-= dimethvl-Ll-dianthraquinonyl with alco 5. As new articles of manufacture the anthracene coloring matters which-can be ob tained from a beta -.halogenated 2.2- dimethyl-1.1-dianthraquinonyl body, which new coloring matter consist of from yellow to brown powders which are in'soluble in water and in dilute acids and in dilute alkalies andare soluble in. concentrated sulfuric acid and in hot mtrobenzene and in hot anilin and which are also soluble in f In testimony whereof I have hereunto set alkaiine hydrosulfite yielding .cherry red my hand in the presence of two subscribing 1e vats \vh%chd produce Oi) cotton blue-red shades 5 witnesses.

which s 1a es on was 1111 are converted into bright orange-red, and vhich coloring mat- MAX Hhxhl IbLEP" ters possess a spectrum difierent from that \Vitnesses:

of the coloring matters claimed in Letters J. ALEc. LLOYD,

Patent No. 876,810. Jos. LL LEUTE. 

